Zte AC570 User Manual page 9

If the notebook PC doesn't support automatic installation, you can run the
installation program in path of My Computer → ZTEMODEM → AutoRun.exe.
The following installation interface will show how to start installation.
Select PENDRIVE, use the modem as U-Disk. Select MODEM, go to next
step.
Recommend you to exit other "Windows" programs, and click "Next".
9